21340144315 has 16 divisors (see below), whose sum is σ = 29489898240. Its totient is φ = 14521534560.

The previous prime is 21340144271. The next prime is 21340144321. The reversal of 21340144315 is 51344104312.

It is not a de Polignac number, because 21340144315 - 2¹¹ = 21340142267 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2322585 + ... + 2331754.

It is an arithmetic number, because the mean of its divisors is an integer number (1843118640).

Almost surely, 2^21340144315 is an apocalyptic number.

21340144315 is a deficient number, since it is larger than the sum of its proper divisors (8149753925).

21340144315 is a wasteful number, since it uses less digits than its factorization.

21340144315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4654482.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 21340144315 its reverse (51344104312), we get a palindrome (72684248627).

The spelling of 21340144315 in words is "twenty-one billion, three hundred forty million, one hundred forty-four thousand, three hundred fifteen".